cl2007 on DeviantArthttps://www.deviantart.com/cl2007/art/native-copper-137640506cl2007

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native copper

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Description

native copper found as a polycrystal... it of course does not come out of the ground this bright- the tarnish/patina oxidation has been removed with acid.

Caledonia Mine, Ontonagon Co., Michigan

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Image size
856x1465px 326.83 KB
Make
Samsung Techwin
Model
<Digimax S700 / Kenox S700 / Digimax Cyber 730>
Shutter Speed
1/10 second
Aperture
F/2.8
Focal Length
6 mm
ISO Speed
94
Date Taken
Apr 12, 2009, 8:56:45 AM
© 2009 - 2024 cl2007
Comments12
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Undistilled's avatar
You do know that that's not how it looks when it comes out of the ground/mine, right?

I happen to live in Michigan and have collected numerous pieces of copper here. Your piece has been dropped in acid to remove the natural oxidation that appears on all natural copper specimens.

It still has its native form (sort of) but certainly not its natural patina. In fact, when you visit the Michigan copper mines, it can be really hard to tell what's copper and what's not because all of the rocks in the mines look gray/brown/black/greenish if they're not quartz or calcite. Hence why metal detectors are used to find nuggets these days - they blend in so well when oxidized.

:)